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!MNH_LIC Copyright 1994-2018 CNRS, Meteo-France and Universite Paul Sabatier
!MNH_LIC This is part of the Meso-NH software governed by the CeCILL-C licence
!MNH_LIC version 1. See LICENSE, CeCILL-C_V1-en.txt and CeCILL-C_V1-fr.txt
!MNH_LIC for details. version 1.
! ########################
MODULE MODI_BLOWSNOW
! ########################
!
!
INTERFACE
!
SUBROUTINE BLOWSNOW(HLBCX,HLBCY,PTSTEP,KRR,PPABST,PTHT,PRT,PZZ,PRHODREF, &
PRHODJ,PEXNREF,PRS,PTHS,PSVT,PSVS,PSNWSUBL3D)
!
CHARACTER(LEN=4), DIMENSION(2), INTENT(IN) :: HLBCX,HLBCY ! X and Y-direc. LBC type
REAL, INTENT(IN) :: PTSTEP ! Time step :XTSTEP in namelist
INTEGER, INTENT(IN) :: KRR ! Number of moist variables
!
REAL, DIMENSION(:,:,:), INTENT(IN) :: PPABST ! abs. pressure at time t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PTHT ! Theta at time t
REAL, DIMENSION(:,:,:,:), INTENT(INOUT):: PRT ! Moist variable at time t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PZZ ! Height (z)
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODREF! Reference dry air density
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODJ !Dry density * Jacobian
REAL, DIMENSION(:,:,:), INTENT(IN) :: PEXNREF ! Reference Exner function
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PTHS ! Theta source
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PRS ! Moist variable sources
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PSVT ! Scalar variable at time t
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PSVS ! Scalar variable sources
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PSNWSUBL3D ! Blowing snow sublimation profile
!
END SUBROUTINE BLOWSNOW
!
END INTERFACE
END MODULE MODI_BLOWSNOW
!
! ######################################################################
SUBROUTINE BLOWSNOW(HLBCX,HLBCY,PTSTEP,KRR,PPABST,PTHT,PRT,PZZ,PRHODREF, &
PRHODJ,PEXNREF,PRS,PTHS,PSVT,PSVS,PSNWSUBL3D)
! ######################################################################
! ##########################################################################
!
!!
!! PURPOSE
!! -------
!! The purpose of this routine is to compute the evolution of blowing snow
!: particles in Meso-NH and the related variables in Canopy
!!
!!
!!** METHOD
!! ------
!!
!! EXTERNAL
!! --------
!! Subroutine BLOWSNOW_VELGRAV: Computes settling velocity of blown snow
! particles
!! Subroutine SUBL_BLOWSNOW : Computes sublimation of blown snow
!! particles
!! Subroutine SEDIM_BLOWSNOW : Computes sedimentation of blown snow
!! particles
!!
!!
!! IMPLICIT ARGUMENTS
!! ------------------
!!
!! REFERENCE
!! ---------
!!
!! Vionnet, V., Martin, E., Masson, V., Guyomarc’h, G., Naaim-Bouvet, F., Prokop, A.,
!! Durand, Y. and Lac, C. :
!! Simulation of wind-induced snow transport and sublimation in alpine terrain
!! using a fully coupled snowpack/atmosphere model, The Cryosphere, 8, 395-415, 2014
!!
!! AUTHOR
!! ------
!! V. Vionnet * CNRM/GAME*
!!
!! MODIFICATIONS
!! -------------
!! Original 10/10/11
!! Implementation in MNH 53 07/2017
!
!* 0. DECLARATIONS
!
USE MODE_ll
!
USE MODD_NSV
USE MODD_PARAMETERS
USE MODD_BLOWSNOW_n
USE MODD_BLOWSNOW
!
USE MODI_SUBL_BLOWSNOW
USE MODI_SEDIM_BLOWSNOW
USE MODI_BLOWSNOW_VELGRAV
!
IMPLICIT NONE
!
!* 0.1 Declarations of dummy arguments :
!
!
!
CHARACTER(LEN=4), DIMENSION(2), INTENT(IN) :: HLBCX,HLBCY ! X and Y-direc. LBC type
REAL, INTENT(IN) :: PTSTEP ! Time step :XTSTEP in namelist
INTEGER, INTENT(IN) :: KRR ! Number of moist variables
!
REAL, DIMENSION(:,:,:), INTENT(IN) :: PPABST ! abs. pressure at time t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PTHT ! Theta at time t
REAL, DIMENSION(:,:,:,:), INTENT(INOUT):: PRT ! Moist variable at time t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PZZ ! Height (z)
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODREF! Reference dry air density
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODJ !Dry density * Jacobian
REAL, DIMENSION(:,:,:), INTENT(IN) :: PEXNREF ! Reference Exner function
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PTHS ! Theta source
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PRS ! Moist variable sources
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PSVT ! Scalar variable at time t
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PSVS ! Scalar variable sources
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PSNWSUBL3D ! Blowing snow sublimation profile
!
!
!* 0.2 Declarations of local variables :
!
INTEGER :: JRR,JSV ! Loop index for the moist and scalar variables
INTEGER :: IIB ! Define the physical domain
INTEGER :: IIE !
INTEGER :: IJB !
INTEGER :: IJE !
INTEGER :: IKB !
INTEGER :: IKE !
REAL, DIMENSION(:,:,:,:), ALLOCATABLE :: ZSVT ! scalar variable for microphysics only
REAL, DIMENSION(:,:,:,:), ALLOCATABLE :: ZSVS ! scalar tendency for microphysics only
REAL, DIMENSION(:,:,:,:), ALLOCATABLE :: ZVGK ! settling velocity for blowing snow variables
!------------------------------------------------------------------------------
!
!* 1. PRELIMINARY COMPUTATIONS
! ------------------------
!
IIB=1+JPHEXT
IIE=SIZE(PZZ,1) - JPHEXT
IJB=1+JPHEXT
IJE=SIZE(PZZ,2) - JPHEXT
IKB=1+JPVEXT
IKE=SIZE(PZZ,3) - JPVEXT
ALLOCATE(ZSVT(SIZE(PZZ,1),SIZE(PZZ,2),SIZE(PZZ,3),NSV_SNWEND - NSV_SNWBEG + 1))
ALLOCATE(ZSVS(SIZE(PZZ,1),SIZE(PZZ,2),SIZE(PZZ,3),NSV_SNWEND - NSV_SNWBEG + 1))
ALLOCATE(ZVGK(SIZE(PZZ,1),SIZE(PZZ,2),SIZE(PZZ,3),NSV_SNWEND - NSV_SNWBEG + 1))
ZSVT = PSVT(:,:,:,NSV_SNWBEG:NSV_SNWEND)
ZSVS = PSVS(:,:,:,NSV_SNWBEG:NSV_SNWEND)
ZVGK = 0.
!
!* 2. TRANSFORMATION INTO PHYSICAL TENDENCIES
! ---------------------------------------
!
PTHS(:,:,:) = PTHS(:,:,:) / PRHODJ(:,:,:)
DO JRR = 1,KRR
PRS(:,:,:,JRR) = PRS(:,:,:,JRR) / PRHODJ(:,:,:)
END DO
DO JSV = 1,SIZE(ZSVS,4)
ZSVS(:,:,:,JSV) = ZSVS(:,:,:,JSV) / PRHODJ(:,:,:)
END DO
!
! complete the vertical boundaries
!
PTHS(:,:,IKB-1) = PTHS(:,:,IKB)
PTHS(:,:,IKE+1) = PTHS(:,:,IKE)
!
PRS(:,:,IKB-1,1) = PRS(:,:,IKB,1)
PRS(:,:,IKE+1,1) = PRS(:,:,IKE,1)
PRS(:,:,IKB-1,2:) = 0.0
PRS(:,:,IKE+1,2:) = 0.0
!
PRT(:,:,IKB-1,1) = PRT(:,:,IKB,1)
PRT(:,:,IKE+1,1) = PRT(:,:,IKE,1)
PRT(:,:,IKB-1,2:) = 0.0
PRT(:,:,IKE+1,2:) = 0.0
!
ZSVS(:,:,IKB-1,:) = 0.0
ZSVS(:,:,IKE+1,:) = 0.0
ZSVT(:,:,IKB-1,:) = 0.0
ZSVT(:,:,IKE+1,:) = 0.0
!
!------------------------------------------------------------------------------
!
!* 3. Settling velocity
! ------------------------
!
! Compute number-averaged and mass-averaged settling velocity. Used later for:
! - sublimation as ventilation velocity
! - sedimentation
!
CALL BLOWSNOW_VELGRAV(ZSVT(:,:,1:IKE+1,:),PTHT(:,:,1:IKE+1), &
PPABST(:,:,1:IKE+1), &
PRHODREF(:,:,1:IKE+1),ZVGK(:,:,1:IKE+1,:))
!------------------------------------------------------------------------------
!
!* 4. Sublimation (optional)
! ------------------------
!
IF(LSNOWSUBL) THEN
! Initialize blowing snow sublimation profile
PSNWSUBL3D(:,:,:) = 0.
! Compute sublimation for MNH levels
CALL SUBL_BLOWSNOW(PZZ, PRHODJ,PRHODREF, PEXNREF, PPABST, &
PTHT, PRT(:,:,:,1), PRT(:,:,:,2),PRT(:,:,:,3), &
PRT(:,:,:,4), PRT(:,:,:,5),PRT(:,:,:,6), &
ZSVT,PTHS,PRS(:,:,:,1),ZSVS,PSNWSUBL3D,ZVGK(:,:,:,2) )
END IF
!------------------------------------------------------------------------------
!
!* 5. Sedimentation
! ------------------------
!
CALL SEDIM_BLOWSNOW(PTHT(IIB:IIE,IJB:IJE,IKB:IKE), PTSTEP,&
PRHODREF(IIB:IIE,IJB:IJE,IKB:IKE), &
PPABST(IIB:IIE,IJB:IJE,IKB:IKE), &
PZZ(IIB:IIE,IJB:IJE,IKB:IKE+1), &
ZSVT(IIB:IIE,IJB:IJE,IKB:IKE,:), &
ZSVS(IIB:IIE,IJB:IJE,IKB:IKE,:),ZVGK(IIB:IIE,IJB:IJE,IKB:IKE,:))
!
!-------------------------------------------------------------------------------
!
!
!* 6. SWITCH BACK TO THE PROGNOSTIC VARIABLES
! ---------------------------------------
!
PTHS(:,:,:) = PTHS(:,:,:) * PRHODJ(:,:,:)
!
DO JRR = 1,KRR
PRS(:,:,:,JRR) = PRS(:,:,:,JRR) * PRHODJ(:,:,:)
END DO
DO JSV = 1,SIZE(ZSVS,4)
PSVS(:,:,:,JSV+NSV_SNWBEG-1) = ZSVS(:,:,:,JSV) * PRHODJ(:,:,:)
END DO
DO JSV = NSV_SNWBEG, NSV_SNWEND
PSVT(:,:,:,JSV) = PSVS(:,:,:,JSV) * PTSTEP / PRHODJ(:,:,:)
END DO
DEALLOCATE(ZSVS)
DEALLOCATE(ZSVT)
END SUBROUTINE BLOWSNOW